Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19

[Andrew Morton]

Paul Jackson <pj@xxxxxxx> wrote:
>
> > Similarly, that SGI patch which was rejected 6-12 months ago to kill off
> > processes once they started swapping.  We thought that it could be done
> > from userspace, but we need a way for userspace to detect when a task is
> > being swapped on a per-task basis.
> > 
> > I'm thinking a few numbers in the mm_struct, incremented in the pageout
> > code, reported via /proc/stat.
> 
> I just sent in a proposed patch for this - one more per-cpuset
> number, tracking the recent rate of calls into the synchronous
> (direct) page reclaim by tasks in the cpuset.
> 
> See the message sent a few minutes ago, with subject:
> 
>   [PATCH 5/5] cpuset: memory reclaim rate meter
> 

uh, OK.  If that patch is merged, does that make Bron happy, so I don't
have to reply to his plaintive email?

I was kind of thinking that the stats should be per-process (actually
per-mm) rather than bound to cpusets.  /proc/<pid>/pageout-stats or something.
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